remove old plan code

tea/plan.go

@@ -1,42 +0,0 @@
-package tea
-
-import "testing"
-
-type step struct {
-	Test
-	name string
-	next *step
-	skip bool
-}
-
-func (s *step) run(t *testing.T) {
-	name := ""
-	for s := s; s != nil; s = s.next {
-		name += s.name
-		if s.next != nil {
-			name += "/"
-		}
-	}
-	t.Run(name, func(t *testing.T) {
-		for s := s; s != nil; s = s.next {
-			s.Test.Run(t)
-		}
-	})
-}
-
-func (t *Tree) plan() []step {
-	if len(t.children) == 0 {
-		s := &step{Test: t.Test, name: parseName(t.Test)}
-		for t.parent != nil {
-			t = t.parent
-			s = &step{Test: t.Test, name: parseName(t.Test), next: s}
-		}
-		return []step{*s}
-	}
-
-	var steps []step
-	for _, child := range t.children {
-		steps = append(steps, child.plan()...)
-	}
-	return steps
-}